AI am frustrated and confused. :-( I decided to order sps supplies and thought I was getting longer columns to support a taller cake, but ended up getting the 9" multi piece Grecian columns from Oasis; its frustrating they don't provide explanations as to what pieces are used for what. What are these 9" multi-pieced sets used for? My stacked cakes will be taller than 4" per tier and I was hoping to use these as the support since the 4" columns won't work. If anyone can be so kind as to give me a helpful and gentle explanation I would appreciate it. I am making tiered cakes tonight. I heard Wiltons columns can be used with sps plates so thats my last resort. Thanks to anyone willing to explain.